Calculating Probability of Events

Calculating probability of simple events: What is the probability of rolling a 3 on a fair six-sided die?

• 1/4

• 1/2

• 1/6

• 1/3

Calculating probability of simple events: If a bag contains 5 red marbles, 3 blue marbles, and 2 green marbles, what is the probability of picking a red marble?

• 3/10 or 3/10

• 2/10 or 2/10

• 5/10 or 1/2

• 4/10 or 4/10

Calculating probability of simple events: If a deck of cards contains 52 cards, what is the probability of drawing a heart?

• 13/52

• 1/52

• 26/52

• 39/52

A jar contains 4 white chips, 5 purple chips, and 1 black chip. Chips are selected randomly one at a time, and are not replaced. P(purple then black) (a)  

• 1/18

• 2/5

• 3/7

• 4/9

A box contains 5 purple marbles, 3 green marbles and 2 orange marbles. Draws are made without replacement. P(orange,green) (a)  

• 1/15

• 2/15

• 3/31

• 1/5

You spin this spinner 3 times.
Find the probability of these 3 events.
P(red, odd, 3)

• 1/216

• 1/72

• 1/36

• 1/12

A letter from the word MATH is chosen at random, then a coin is flipped. What is the probability of choosing the letter 'm' and then getting tails? (a)  

• 17/26

• 1/8

• 5/13

• 1/6

A letter from the word MATH is chosen at random, then a coin is flipped. What is the probability of choosing the letter 'm' then getting tails? (a)  

• 17/26

• 1/8

• 5/13

• 1/6

With a well-shuffled, standard deck, what is the probability of drawing an ace or a heart or both?

Mathematical Equivalence

ON

Theoretical probability: If a bag contains 4 red balls, 3 blue balls, and 5 green balls, what is the theoretical probability of picking a blue ball?

• 3/5

• 2/12

• 1/10

• 3/12 or 1/4